Operation Juno was a German sortie into the Norwegian Sea during the Norwegian Campaign, with the goal of helping the German Army to drive the Allied out of northern Norway and to recapture Narvik. The most notable engagement of the operation was the German battleships Scharnhorst and Gneisenau sinking the British aircraft carrier HMS Glorious and its two escorting destroyers. Several Allied vessels were sunk in other engagements.

Z15 Erich Steinbrinck was a Type 1934A-class destroyer built for Nazi Germany's Kriegsmarine in the mid-1930s. The ship was named after the First World War German naval officer Erich Steinbrinck. At the beginning of World War II on 1 September 1939, the ship was initially deployed to blockade the Polish coast, but she was quickly transferred to the North Sea to lay defensive minefields. In late 1939 and 1940 the ship laid multiple offensive minefields off the English coast that claimed 24 merchant ships and a destroyer. Steinbrinck was under repair for most of the Norwegian Campaign of early 1940 and was transferred to France later that year.